RVEDKAV - Ventable, pilot operated, balanced piston relief valve with drain to port 4

Part Number: RVEDKAV

Manufacturer: Sun Hydraulics

DESCRIPTION:

Ventable, pilot-operated, balanced piston relief cartridges with external drain are normally closed pressure regulating valves. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to regulate the pressure. They provide a vent port (port 3) that connects between the main piston and pilot stage to provide for remote control by other pilot or 2-way valves and a drain (port 4) that makes them insensitive to back pressure. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast.

  • Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. If used in cross port relief circuits, consider spool leakage.
  • Main stage orifice is protected by a 150 micron stainless steel screen.
  • Not suitable for use in load holding applications due to spool leakage.
  • Pressure at port 4 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
  • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • W and Y controls (where applicable) can be specified with or without a special setting. When no special setting is specified, the valve is adjustable throughout its full range using the W or Y control. When a special setting is specified, this setting represents the maximum setting of the valve.
  • Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.

CavityT-22A
Series2
Capacity30 gpm120 L/min.
Factory Pressure Settings Established at4 gpm15 L/min.
Maximum Operating Pressure5000 psi350 bar
Control Pilot Flow10 - 15 in³/min.0,16 - 0,25 L/min.
Response Time - Typical10 ms10 ms
Maximum Valve Leakage at 110 SUS (24 cSt)3 in³/min.@1000 psi50 cc/min.@70 bar
Adjustment - Number of Clockwise Turns to Increase Setting55
Valve Hex Size1 1/8 in.28,6 mm
Valve Installation Torque45 - 50 lbf ft61 - 68 Nm
Adjustment Screw Internal Hex Size5/32 in.4 mm
Locknut Hex Size9/16 in.15 mm
Locknut Torque80 - 90 lbf in.9 - 10 Nm
Model Weight.70 lb0,30 kg
Seal kit - CartridgeViton: 990-022-006

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